Improved the gnuplot postprocessing demo in order to use better color and line schemes in gnuplot.
Improved the gnuplot postprocessing demo in order to use better color and line schemes in gnuplot.

Milad-Rakhsha/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,dariomangoni/chrono,rserban/chrono,dariomangoni/chrono,dariomangoni/chrono,dariomangoni/chrono,rserban/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,dariomangoni/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono